Attachment for turning-lathes.



G. R. BENNETT.

ATTACHMENT FOR TURNING LATHES.

APPLICATION FILEDJUNE22,1911

1,054,387, Patented Feb. 25, 1913.

2 SHEETSBHEET 1.

31404244 00; GR.Be1meii Witnesses COLUMBIA PLANcuRAPn CO..WASHINGTON. 0.c4

G. R. BENNETT.

ATTACHMENT FOR TURNING LATHBS.

APPLICATION rum) JUNE 22,1911.

1,054,387. Patented Feb.25, 1913..

, 2 8HEETSBHEET 2.

314012 to c MM i caLuMnm pLANoquAlm CO..wAsmNuTON. D. c.

UNTTED STATES PATENT OFFICE.

GEORGE R. BENNETT. OF WHISTLER, ALABAMA.

ATTACHMENT FOR TURNING-LATHES.

To all whom it may concern:

Be it known that I, GEORGE 1t. BENNETI, a citizen of the United States,residing at WVhistler, in the county of Mobile and State of Alabama,have invented certain new and. useful Improvements in Attachments forTurning-Lathes; and I do hereby declare the following to be a full,clear, and exact description of the invention such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in attachments for turning lathesand is especially designed to be secured to the tool post guide of thecarriage for the purpose of revolving a cutting tool around a shaft orsimilar part of a piece of work for turning or truing same.

The object of the invention is to provide an attachment which may beapplied to an. ordinary turning lathe to provide means for turning partsof large castings which could not be rotated in the lathe in the usualmanner.

lVith the above and other objects in view, the invention consists incertain combinations and arrangements of the parts hereinafterdescribed, and the novel features thereof will be particularly pointedout in the appended claims.

The preferred embodiment of the invention is illustrated in theaccompanying drawings, in which like characters of refer ence indicatecorresponding parts.

Figure 1 shows an ordinary lathe with my attachment applied thereto;Fig. 2 a longitudinal section of the attachment; Fig. 3 is a sectionalelevation taken on line 33 of Fig. 2;. and Fig. 4 is an elevation of thegear wheel.

In the drawings 1 represents the frame of an ordinary lathe providedwith the usual longitudinally sliding carriage 2 having a transverseguide 8 for the slide carrying the too-l post.

1 represents the head stock, 5 the head center and 6 the drive gear ofthe lathe. The drive gear 6 is rotated by means of a belt passing aroundthe stepped pulley"? in the usual manner.

My improved attachment consists of a support 8 having a base 9 which isprovided with a guideway 10, corresponding to but somewhat wider thanthe guide 3 of the carriage to allow for a key 11. The support 8 ismounted on the guide 3 and se- Specification of Letters Patent.

Application filed June 22. 1911.

Patented Feb. 25, 1913.

Serial No. 634,745.

cured in place by means of a suitable number of binding screws 12threaded in the base 9 and bearing against the key 11. The support 8 isprovided with a bearing 13, in which is rotatably mounted a hollowmember 14 having at its outer end a large gear wheel 15 and atits innerend a flange 16, which parts engage the sides of the support and also abearing cap 17 secured to the support by bolts 18. The flange 16 isrecessed as at 19 for receiving a. turning tool 20 which is held in therecess by the pressure.

of a clamping plate 21 having a longitudinal projection 22 for fittinginto said recess, and the clamping plate is adjustably secured to theflange 16 by means of tap bolts 23, and extending from the flange is aboss 24: in which is threaded an adjusting screw 25 for engaging theinner end of the tool. The hollow member 14 is preferably dividedlongitudinally as at 26 for facilitating application to the part to beturned, one of the parts being provided with tongues 27 and the otherwith corresponding grooves 28, and said parts are rigidly securedtogether by bolts 29 passing through lugs 30 and bolts 31 througl'lflanges The hollow member 14 is rotated from the drive gear (3 of thelathe through the medium of a shaft 33 rotatably supported at one end bya bracket 34 removably secured to the head stock 4 of the lathe by bolts35, and having fixed to its projecting end a pinion 36 which meshes withsaid drive gear (3. A collar 37 fixed on the shaft and engaging thebracket 34 prevents longitudinal movement of the shaft. The shaft 33 isprovided with a key-way 38 in which slides a feather key 39 of a sleevecar- .rying a pinion 10 at its outer end, which meshes with the largegear wheel 15 for driving same and a flanged nut 41-1 at its in-. norend. Said sleeve is rotatably mounted in a bearing of an extension 43 ofthe support with the pinion and flanged nut engaging the sides thereof.

In order to apply my attachment to a lathe, the slide carrying the toolpost is removed from the guide 3 of the carriage 2 and the attachmentsecured thereto as described. A casting having a part to be turned,which is too large to permit the revolving of the casting in the lathein the usual manner, is centered by the head center 5 and tail stockcenter in the ordinary way, the part to be operated upon passes tool 20is revolved around said part.

through the hollow member 14 and the casting remains stationary whilethe turning As the carriage of the lathe carries the turning toolbackward and forward it is readily seen that said part of the castingmay be turned or trued.

Although the elements set forth and described are well adapted toaccomplish the purposes for which they are intended, it is tobeunderstood that slight changes in the minor details of construction andarrangements of the parts may be resorted to without sacrificing any ofthe advantages or departing from the spirit of the invention.

Having fully described my invention, what I claim is 1. In a latheattachment, the combination of a support adapted to be secured to thecarriage of the lathe, the support being provided with a bearing, ahollow member formed of two longitudinal sections fitted together bymeans of tongues and grooves, means for removably securing the sectionstogether, the hollow member being formed with a flange at one end, agear wheel fixed to the hollow member, a cap for the hollow memberremovably secured to the support, a tool adjustably secured to theflange and projecting inwardly, and means for driving the gear wheelfrom the drive gear of the lathe, substantially as described.

2. In a lathe, the combination of a support adapted to be secured to thetool-post slide guide of the lathe carriage, a hollow member rot-atablymounted in the support, the hollow member being provided at one end witha recess, a tool in the recess, means for clamping the tool 1n therecess, a gear wheel fixed to the hollow member, a rotatable shaft, apinion on the shaft and meshing with the gear wheel, and means forslidably connecting the pinion and shaft, sub stantially as described.

8. In a lathe attachment, the combination of a support adapted to besecured to the tool-post slide of the lathe carriage, the support beingprovided with a bearing, a hollow member formed of two sections removably secured together and rotatably mounted in the bearing, a cap forthe hollow member removably securedt-o the support, the hollow memberbeing formed with a flange at one end and having a gear wheel at itsother end, atool adjustably secured to the flange and projecting intothe hollow por tion thereof, a bracket removably secured to the headstock of the lathe, a shaft journaled in the bracket and driven from thedrive gear of'the lathe, the shaft being provided with a longitudinalgroove, a sleeve mounted on the shaft, a key fixed inthe sleeve andslidably mounted in the groove of the shaft, the sleeve being rotatablymounted in the support, and a pinion fixed to the sleeve and meshingwith said gear wheel, substantially as described.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

GEORGE R. BENNETT.

Witnesses WVM. S. ANDERSON, F. T. PERKINS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

